diff --git a/container/registry/base/Dockerfile b/container/registry/base/Dockerfile
index cb242babb..182848522 100644
--- a/container/registry/base/Dockerfile
+++ b/container/registry/base/Dockerfile
@@ -16,7 +16,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-ARG PHP_IMAGE_VERSION=8.1.19
+ARG PHP_IMAGE_VERSION=8.1.20
 FROM php:${PHP_IMAGE_VERSION}-apache-bullseye
 
 # Official PHP image with Apache HTTPD includes